Richard IV may refer to:
Perkin Warbeck, pretender to the English throne Richard of Shrewsbury, 1st Duke of York, impersonated by Warbeck, and whom the Blackadder character was very loosely based on Richard de la Pole, the Yorkist pretender, declared king of England by Louis of France in 1513.
Fictional characters
Richard IV of England (Blackadder), fictional character in TV series Blackadder based on Richard of Shrewsbury Richard IV, fictional character in TV programme The Palace Richard IV, first son of Victoria II, in Long Live The King by John Rowe Richard IV, father of Henry IX, in the 2003 novel Yellow Dog by Martin Amis